If we forget the Google account or do not set google account for applying lock pattern, then we can restore the phone via hotkey. This procedure is for blocking problem samsung pro B7510 glaxy pattern. Follow the steps to resolve this problem.

Note: Before do that take backup of important data because this will erase every thing in mobile memory.

Press and hold power and T/3 key on qwerty keyboard Tab android logo Select recovery then wipe data Reboot mobile with home button